Happy birthday, Jeff Bezos: Here's another $1.5M

Amazon (AMZN) founder Jeff Bezos turns 51 years old Monday. One of the richest people in the world, Bezos' fortune is estimated to be about $28 billion. That begs the question: How much money has he accumulated on a per-day basis in his entire life? We know this isn't true, but taking the broad stroke assumption that Bezos' wealth of $28 billion grew equally over his entire life, Bezos has averaged $1.5 million per day in wealth accumulation from the day he was born. Again, that is $1.5 million per day. That's not bad-but it's not the best. It's not even half the rate that two software-company founding Harvard dropouts have raked in. Microsoft (MSFT)'s Bill Gates and Facebook (FB)'s Mark Zuckerberg both have averaged more than $3 million per day in wealth growth their entire life.

Obviously this is not intended to be the most heavy duty analysis in the world, but it does give you a flavor of the comparison to wealth and age, and the sheer quantity the world's richest have. Below are the fifty wealthiest people in the world, and their per-day accumulation rates. Other famous billionaires on the list include Google (GOOGL) founders Larry Page and Sergey Brin , Nike (NKE) founder Phil Knight as well as Wall Street titans George Soros and Carl Icahn . Where does your favorite billionaire rank?